Speedtest.net is best website if you want to check your net speed. At a single click you get to know net speed.
Your net provider cannot fool you with your net speed. It happens many a time when my net works slow. I simply check my net speed and if speed is not as per my plan, I call my net provider and tell him that I am not getting speed as per my plan and I also have proof.
Whatever is their logic to calculate the speed, it is indeed great. They also came up with speedtest app for android, ios as well as windows. Now I can even check my 3g speed. They show both download and upload speed. Thanks to speedtest developers. Your website has helped a lot.
Try this website to check your net speed.